Text Tools Jun 23, 2026

AR, SK, and 73: The Prosigns and Q Codes That Make Morse Code a Complete Communication Protocol

Morse code prosigns — like AR (end of message / "over"), SK (signing off / "out"), and KN (only the named station should reply) — are a complete communication protocol built into the code. Q codes like QTH (location), QSL (confirm receipt), and QRP (low power) provide internationally standardized shorthand that works across language barriers. Here's how a complete amateur radio Morse contact (QSO) is structured, and why 73 means "best regards."

Text Tools Jun 15, 2026

Morse Code Timing: Why "Faster" Means Rescaling Five Different Things at Once

A Morse code message can be sent anywhere from 5 to 40+ words per minute — but unlike typing speed, "faster" doesn't mean "the same dots and dashes, sooner." Every timing element (dot, dash, and three different gap types) is defined as a ratio relative to a single unit, and that unit scales together across all five elements at once. Here's how WPM is calibrated using the word "PARIS," why high-speed Morse becomes a perceptual rather than counted skill, and why Farnsworth timing deliberately breaks the proportional system for learners.

Text Tools Jun 13, 2026

Morse Code Isn't History: SOS, Aviation Navigation Beacons, and Why Amateur Radio Operators Still Choose CW

SOS — three dots, three dashes, three dots — wasn't chosen for "Save Our Souls." It was chosen because that specific rhythm is virtually impossible to mistake for anything else, even under terrible signal conditions, and works via radio, light, or sound. Here's why Morse code remains actively used today in aviation navigation beacon identifiers and amateur radio CW operation — not as history, but for genuine technical advantages.

Text Tools Jun 10, 2026

Morse Code and the History of Digital Communication: From Telegraph Networks to Huffman Coding

Morse code was the first digital communication protocol — and its variable-length encoding by letter frequency is the same principle used in JPEG compression today. Here's how Huffman coding originated in Vail's counting printer type cases, why timing disambiguates codes without fixed delimiters, and why CW radio survived into the 21st century.

Text Tools Jun 9, 2026

Morse Code as Assistive Technology: Enabling Communication with a Single Button

Morse code is an active assistive technology enabling people with motor disabilities to type with a single button. Here's Google's Morse keyboard for Android, how two-switch input works, why Morse code still matters in amateur radio, and the binary tree that makes it efficient.

Text Tools Jun 6, 2026

Morse Code Translator — Convert Text to Dots & Dashes Instantly

Learn how Morse code works, what SOS actually means, where Morse code is still used today (amateur radio, aviation, accessibility), and how to use a free Morse code translator for any text.